WAGO 750-872/020-000 Manual page 219

2 Channel Digital Input Modules
750-400, -401, -405, -406, -410, -411, -412, -427, -438, (and all variations),
753-400, -401, -405, -406, -410, -411, -412, -427
2 Channel Digital Input Modules with Diagnostics
750-419, -421, -424, -425, 753-421, -424, -425
2 Channel Digital Input Module with Diagnostics and Output Process
Data
750-418, 753-418
The 750-418, 753-418 digital input module supplies a diagnostic and
acknowledge bit for each input channel. If a fault condition occurs, the
diagnostic bit is set. After the fault condition is cleared, an acknowledge bit
must be set to re-activate the input. The diagnostic data and input data bit is
mapped in the Input Process Image, while the acknowledge bit is in the Output
Process Image.
4 Channel Digital Input Modules
WAGO-I/O-SYSTEM 750
ETHERNET TCP/IP
Bit 7 Bit 6 Bit 5
Bit 7 Bit 6 Bit 5
Bit 7 Bit 6 Bit 5
Bit 7 Bit 6 Bit 5
Process Data Architecture for MODBUS/TCP
Input Process Image
Bit 4 Bit 3
Input Process Image
Bit 4 Bit 3
Diagnostic
bit S 2
Channel 2
Input Process Image
Bit 4 Bit 3
Diagnostic
bit S 2
Channel 2
Output Process Image
Bit 4 Bit 3
Acknowledge Acknowledg
ment bit
Q 2
Channel 2
I/O Modules
Bit 2 Bit 1
Data bit
DI 2
Channel
2
Bit 2 Bit 1
Diagnostic Data bit
bit S 1 DI 2
Channel 1 Channel
2
Bit 2 Bit 1
Diagnostic Data bit
bit S 1 DI 2
Channel 1 Channel
2
Bit 2 Bit 1
ement bit
0
Q 1
Channel 1
• 211
Bit 0
Data bit
DI 1
Channel
1
Bit 0
Data bit
DI 1
Channel
1
Bit 0
Data bit
DI 1
Channel
1
Bit 0
0